From patchwork Thu Aug 8 13:41:27 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Vetter X-Patchwork-Id: 2841235 Return-Path: X-Original-To: patchwork-dri-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 7DC25BF546 for ; Thu, 8 Aug 2013 14:17:46 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 1F4032054E for ; Thu, 8 Aug 2013 14:17:45 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 688F320557 for ; Thu, 8 Aug 2013 14:17:42 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 054D1E6883 for ; Thu, 8 Aug 2013 07:17:42 -0700 (PDT) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-ea0-f182.google.com (mail-ea0-f182.google.com [209.85.215.182]) by gabe.freedesktop.org (Postfix) with ESMTP id 84CB1E681F for ; Thu, 8 Aug 2013 06:42:01 -0700 (PDT) Received: by mail-ea0-f182.google.com with SMTP id o10so1446472eaj.41 for ; Thu, 08 Aug 2013 06:42:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ffwll.ch; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=63BXqpPxGfp1Q4+ROORexT1wR6MUvyQo8+fzx3iptsc=; b=lMsIGu1XTwfMdep67njq11MAMvzT1qATkj85dNkWB5TDCkgNygcrGarevirM5koxDp ayb2xWr043hdkA6wb7S6AOcKijTTdWOjxDHDh7vMrnb7YQ6XB0z9IwKE3IXrg6U/YwTE P5iLomLm4v4t+fspukzh/L0N96+9scvQdquL4= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=63BXqpPxGfp1Q4+ROORexT1wR6MUvyQo8+fzx3iptsc=; b=Bh+B8fkZc5ffxHrehoKXkING5vdrFLJk09WU0qpDJK+EvwjeY1eFZbDclqUX2/ld83 S3CL7sX0S7GfO21jy8Od4o7T/dfCK4d0guH+8Mb7yRy4LYzWxv7050SrJ7/Z3VScc2G1 OyTStFyngdSUgDBlfFMZ72R5E139ANpda7LYUtPHhWbWVsIeCRnomDFwADsbdngZHzVU wdqxkHzOzZFnc/z2aWiTCU91gSZGNkfE0+iCBiKx3JlgiMn6eh+09UppEs5btjFGczW8 mdNg2LkEcFN50jHAkWqcsUFqDcxuSwYL6lpJ4Nh8qWIOZP1QBpflZ5LwqyFiWDj/VzwQ E6xQ== X-Gm-Message-State: ALoCoQkwAkwHP+epCMMlMWvY8L2jxqHVhcLonu001/AKkRnINfWU3BSHdEEw5kQ5RRYJLgETfXcc X-Received: by 10.14.176.199 with SMTP id b47mr8335791eem.117.1375969320631; Thu, 08 Aug 2013 06:42:00 -0700 (PDT) Received: from phenom.ffwll.local (178-83-130-250.dynamic.hispeed.ch. [178.83.130.250]) by mx.google.com with ESMTPSA id bn13sm19282226eeb.11.2013.08.08.06.41.57 for (version=TLSv1.2 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 08 Aug 2013 06:41:59 -0700 (PDT) From: Daniel Vetter To: DRI Development Subject: [PATCH 17/25] drm: rip out drm_core_has_MTRR checks Date: Thu, 8 Aug 2013 15:41:27 +0200 Message-Id: <1375969295-18929-18-git-send-email-daniel.vetter@ffwll.ch> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1375969295-18929-1-git-send-email-daniel.vetter@ffwll.ch> References: <1375969295-18929-1-git-send-email-daniel.vetter@ffwll.ch> Cc: Daniel Vetter , Andy Lutomirski X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: dri-devel-bounces+patchwork-dri-devel=patchwork.kernel.org@lists.freedesktop.org Errors-To: dri-devel-bounces+patchwork-dri-devel=patchwork.kernel.org@lists.freedesktop.org X-Spam-Status: No, score=-4.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED,RP_MATCHES_RCVD,T_DKIM_INVALID,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The new arch_phys_wc_add/del functions do the right thing both with and without MTRR support in the kernel. So we can drop these additional checks. David Herrmann suggest to also kill the DRIVER_USE_MTRR flag since it's now unused, which spurred me to do a bit a better audit of the affected drivers. David helped a lot in that. Quoting our mail discussion: On Wed, Jul 10, 2013 at 5:41 PM, David Herrmann wrote: > On Wed, Jul 10, 2013 at 5:22 PM, Daniel Vetter wrote: >> On Wed, Jul 10, 2013 at 3:51 PM, David Herrmann wrote: >>>> -#if __OS_HAS_MTRR >>>> -static inline int drm_core_has_MTRR(struct drm_device *dev) >>>> -{ >>>> - return drm_core_check_feature(dev, DRIVER_USE_MTRR); >>>> -} >>>> -#else >>>> -#define drm_core_has_MTRR(dev) (0) >>>> -#endif >>>> - >>> >>> That was the last user of DRIVER_USE_MTRR (apart from drivers setting >>> it in .driver_features). Any reason to keep it around? >> >> Yeah, I guess we could rip things out. Which will also force me to >> properly audit drivers for the eventual behaviour change this could >> entail (in case there's an x86 driver which did not ask for an mtrr, >> but iirc there isn't). > > david@david-mb ~/dev/kernel/linux $ for i in drivers/gpu/drm/* ; do if > test -d "$i" ; then if ! grep -q USE_MTRR -r $i ; then echo $i ; fi ; > fi ; done > drivers/gpu/drm/exynos > drivers/gpu/drm/gma500 > drivers/gpu/drm/i2c > drivers/gpu/drm/nouveau > drivers/gpu/drm/omapdrm > drivers/gpu/drm/qxl > drivers/gpu/drm/rcar-du > drivers/gpu/drm/shmobile > drivers/gpu/drm/tilcdc > drivers/gpu/drm/ttm > drivers/gpu/drm/udl > drivers/gpu/drm/vmwgfx > david@david-mb ~/dev/kernel/linux $ > > So for x86 gma500,nouveau,qxl,udl,vmwgfx don't set DRIVER_USE_MTRR. > But I cannot tell whether they break if we call arch_phys_wc_add/del, > anyway. At least nouveau seemed to work here, but it doesn't use AGP > or drm_bufs, I guess. Cool, thanks a lot for stitching together the list of drivers to look at. So for real KMS drivers it's the drives responsibility to add an mtrr if it needs one. nouvea, radeon, mgag200, i915 and vmwgfx do that already. Somehow the savage driver also ends up doing that, I have no idea why. Note that gma500 as a pure KMS driver doesn't need MTRR setup since the platforms that it supports all support PAT. So no MTRRs needed to get wc iomappings. The mtrr support in the drm core is all for legacy mappings of garts, framebuffers and registers. All legacy drivers set the USE_MTRR flag, so we're good there. All in all I think we can really just ditch this /endquote v2: Also kill DRIVER_USE_MTRR as suggested by David Herrmann v3: Rebase on top of David Herrmann's agp setup/cleanup changes. Cc: David Herrmann Cc: Andy Lutomirski Signed-off-by: Daniel Vetter Acked-by: Andy Lutomirski Reviewed-by: David Herrmann --- drivers/gpu/drm/ast/ast_drv.c | 2 +- drivers/gpu/drm/cirrus/cirrus_drv.c | 2 +- drivers/gpu/drm/drm_bufs.c | 13 +++++-------- drivers/gpu/drm/drm_pci.c | 14 ++++++-------- drivers/gpu/drm/drm_vm.c | 3 +-- drivers/gpu/drm/i810/i810_drv.c | 2 +- drivers/gpu/drm/i915/i915_drv.c | 2 +- drivers/gpu/drm/mga/mga_drv.c | 2 +- drivers/gpu/drm/mgag200/mgag200_drv.c | 2 +- drivers/gpu/drm/r128/r128_drv.c | 2 +- drivers/gpu/drm/radeon/radeon_drv.c | 4 ++-- drivers/gpu/drm/savage/savage_drv.c | 2 +- drivers/gpu/drm/sis/sis_drv.c | 2 +- drivers/gpu/drm/tdfx/tdfx_drv.c | 1 - drivers/gpu/drm/via/via_drv.c | 2 +- include/drm/drmP.h | 11 ----------- 16 files changed, 24 insertions(+), 42 deletions(-) diff --git a/drivers/gpu/drm/ast/ast_drv.c b/drivers/gpu/drm/ast/ast_drv.c index 60f1ce3..32e270d 100644 --- a/drivers/gpu/drm/ast/ast_drv.c +++ b/drivers/gpu/drm/ast/ast_drv.c @@ -197,7 +197,7 @@ static const struct file_operations ast_fops = { }; static struct drm_driver driver = { - .driver_features = DRIVER_USE_MTRR | DRIVER_MODESET | DRIVER_GEM, + .driver_features = DRIVER_MODESET | DRIVER_GEM, .dev_priv_size = 0, .load = ast_driver_load, diff --git a/drivers/gpu/drm/cirrus/cirrus_drv.c b/drivers/gpu/drm/cirrus/cirrus_drv.c index dd9c908..138364d 100644 --- a/drivers/gpu/drm/cirrus/cirrus_drv.c +++ b/drivers/gpu/drm/cirrus/cirrus_drv.c @@ -87,7 +87,7 @@ static const struct file_operations cirrus_driver_fops = { #endif }; static struct drm_driver driver = { - .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_USE_MTRR, + .driver_features = DRIVER_MODESET | DRIVER_GEM, .load = cirrus_driver_load, .unload = cirrus_driver_unload, .fops = &cirrus_driver_fops, diff --git a/drivers/gpu/drm/drm_bufs.c b/drivers/gpu/drm/drm_bufs.c index 5f73f0a..f63133b 100644 --- a/drivers/gpu/drm/drm_bufs.c +++ b/drivers/gpu/drm/drm_bufs.c @@ -207,12 +207,10 @@ static int drm_addmap_core(struct drm_device * dev, resource_size_t offset, return 0; } - if (drm_core_has_MTRR(dev)) { - if (map->type == _DRM_FRAME_BUFFER || - (map->flags & _DRM_WRITE_COMBINING)) { - map->mtrr = - arch_phys_wc_add(map->offset, map->size); - } + if (map->type == _DRM_FRAME_BUFFER || + (map->flags & _DRM_WRITE_COMBINING)) { + map->mtrr = + arch_phys_wc_add(map->offset, map->size); } if (map->type == _DRM_REGISTERS) { if (map->flags & _DRM_WRITE_COMBINING) @@ -464,8 +462,7 @@ int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map) iounmap(map->handle); /* FALLTHROUGH */ case _DRM_FRAME_BUFFER: - if (drm_core_has_MTRR(dev)) - arch_phys_wc_del(map->mtrr); + arch_phys_wc_del(map->mtrr); break; case _DRM_SHM: vfree(map->handle); diff --git a/drivers/gpu/drm/drm_pci.c b/drivers/gpu/drm/drm_pci.c index 0f54ad8..3fca2db 100644 --- a/drivers/gpu/drm/drm_pci.c +++ b/drivers/gpu/drm/drm_pci.c @@ -272,12 +272,11 @@ static int drm_pci_agp_init(struct drm_device *dev) DRM_ERROR("Cannot initialize the agpgart module.\n"); return -EINVAL; } - if (drm_core_has_MTRR(dev)) { - if (dev->agp) - dev->agp->agp_mtrr = arch_phys_wc_add( - dev->agp->agp_info.aper_base, - dev->agp->agp_info.aper_size * - 1024 * 1024); + if (dev->agp) { + dev->agp->agp_mtrr = arch_phys_wc_add( + dev->agp->agp_info.aper_base, + dev->agp->agp_info.aper_size * + 1024 * 1024); } } return 0; @@ -286,8 +285,7 @@ static int drm_pci_agp_init(struct drm_device *dev) static void drm_pci_agp_destroy(struct drm_device *dev) { if (drm_core_has_AGP(dev) && dev->agp) { - if (drm_core_has_MTRR(dev)) - arch_phys_wc_del(dev->agp->agp_mtrr); + arch_phys_wc_del(dev->agp->agp_mtrr); drm_agp_clear(dev); drm_agp_destroy(dev->agp); dev->agp = NULL; diff --git a/drivers/gpu/drm/drm_vm.c b/drivers/gpu/drm/drm_vm.c index feb2003..b5c5af7 100644 --- a/drivers/gpu/drm/drm_vm.c +++ b/drivers/gpu/drm/drm_vm.c @@ -251,8 +251,7 @@ static void drm_vm_shm_close(struct vm_area_struct *vma) switch (map->type) { case _DRM_REGISTERS: case _DRM_FRAME_BUFFER: - if (drm_core_has_MTRR(dev)) - arch_phys_wc_del(map->mtrr); + arch_phys_wc_del(map->mtrr); iounmap(map->handle); break; case _DRM_SHM: diff --git a/drivers/gpu/drm/i810/i810_drv.c b/drivers/gpu/drm/i810/i810_drv.c index d85c05b..d8180d2 100644 --- a/drivers/gpu/drm/i810/i810_drv.c +++ b/drivers/gpu/drm/i810/i810_drv.c @@ -57,7 +57,7 @@ static const struct file_operations i810_driver_fops = { static struct drm_driver driver = { .driver_features = - DRIVER_USE_AGP | DRIVER_REQUIRE_AGP | DRIVER_USE_MTRR | + DRIVER_USE_AGP | DRIVER_REQUIRE_AGP | DRIVER_HAVE_DMA, .dev_priv_size = sizeof(drm_i810_buf_priv_t), .load = i810_driver_load, diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 9411a74..eec47bd 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -1006,7 +1006,7 @@ static struct drm_driver driver = { * deal with them for Intel hardware. */ .driver_features = - DRIVER_USE_AGP | DRIVER_REQUIRE_AGP | /* DRIVER_USE_MTRR |*/ + DRIVER_USE_AGP | DRIVER_REQUIRE_AGP | DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED | DRIVER_GEM | DRIVER_PRIME, .load = i915_driver_load, .unload = i915_driver_unload, diff --git a/drivers/gpu/drm/mga/mga_drv.c b/drivers/gpu/drm/mga/mga_drv.c index fe71e1e..6b1a87c 100644 --- a/drivers/gpu/drm/mga/mga_drv.c +++ b/drivers/gpu/drm/mga/mga_drv.c @@ -58,7 +58,7 @@ static const struct file_operations mga_driver_fops = { static struct drm_driver driver = { .driver_features = - DRIVER_USE_AGP | DRIVER_USE_MTRR | DRIVER_PCI_DMA | + DRIVER_USE_AGP | DRIVER_PCI_DMA | DRIVER_HAVE_DMA | DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED, .dev_priv_size = sizeof(drm_mga_buf_priv_t), .load = mga_driver_load, diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.c b/drivers/gpu/drm/mgag200/mgag200_drv.c index b570127..fcce7b2 100644 --- a/drivers/gpu/drm/mgag200/mgag200_drv.c +++ b/drivers/gpu/drm/mgag200/mgag200_drv.c @@ -88,7 +88,7 @@ static const struct file_operations mgag200_driver_fops = { }; static struct drm_driver driver = { - .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_USE_MTRR, + .driver_features = DRIVER_GEM | DRIVER_MODESET, .load = mgag200_driver_load, .unload = mgag200_driver_unload, .fops = &mgag200_driver_fops, diff --git a/drivers/gpu/drm/r128/r128_drv.c b/drivers/gpu/drm/r128/r128_drv.c index c2338cb..5bd307c 100644 --- a/drivers/gpu/drm/r128/r128_drv.c +++ b/drivers/gpu/drm/r128/r128_drv.c @@ -56,7 +56,7 @@ static const struct file_operations r128_driver_fops = { static struct drm_driver driver = { .driver_features = - DRIVER_USE_AGP | DRIVER_USE_MTRR | DRIVER_PCI_DMA | DRIVER_SG | + DRIVER_USE_AGP | DRIVER_PCI_DMA | DRIVER_SG | DRIVER_HAVE_DMA | DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED, .dev_priv_size = sizeof(drm_r128_buf_priv_t), .load = r128_driver_load, diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c index 3e52331..1f93dd5 100644 --- a/drivers/gpu/drm/radeon/radeon_drv.c +++ b/drivers/gpu/drm/radeon/radeon_drv.c @@ -275,7 +275,7 @@ static const struct file_operations radeon_driver_old_fops = { static struct drm_driver driver_old = { .driver_features = - DRIVER_USE_AGP | DRIVER_USE_MTRR | DRIVER_PCI_DMA | DRIVER_SG | + DRIVER_USE_AGP | DRIVER_PCI_DMA | DRIVER_SG | DRIVER_HAVE_IRQ | DRIVER_HAVE_DMA | DRIVER_IRQ_SHARED, .dev_priv_size = sizeof(drm_radeon_buf_priv_t), .load = radeon_driver_load, @@ -382,7 +382,7 @@ static const struct file_operations radeon_driver_kms_fops = { static struct drm_driver kms_driver = { .driver_features = - DRIVER_USE_AGP | DRIVER_USE_MTRR | + DRIVER_USE_AGP | DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED | DRIVER_GEM | DRIVER_PRIME, .dev_priv_size = 0, diff --git a/drivers/gpu/drm/savage/savage_drv.c b/drivers/gpu/drm/savage/savage_drv.c index 9135c8b..3c03021 100644 --- a/drivers/gpu/drm/savage/savage_drv.c +++ b/drivers/gpu/drm/savage/savage_drv.c @@ -50,7 +50,7 @@ static const struct file_operations savage_driver_fops = { static struct drm_driver driver = { .driver_features = - DRIVER_USE_AGP | DRIVER_USE_MTRR | DRIVER_HAVE_DMA | DRIVER_PCI_DMA, + DRIVER_USE_AGP | DRIVER_HAVE_DMA | DRIVER_PCI_DMA, .dev_priv_size = sizeof(drm_savage_buf_priv_t), .load = savage_driver_load, .firstopen = savage_driver_firstopen, diff --git a/drivers/gpu/drm/sis/sis_drv.c b/drivers/gpu/drm/sis/sis_drv.c index b88b2d3..4383b74 100644 --- a/drivers/gpu/drm/sis/sis_drv.c +++ b/drivers/gpu/drm/sis/sis_drv.c @@ -102,7 +102,7 @@ void sis_driver_postclose(struct drm_device *dev, struct drm_file *file) } static struct drm_driver driver = { - .driver_features = DRIVER_USE_AGP | DRIVER_USE_MTRR, + .driver_features = DRIVER_USE_AGP, .load = sis_driver_load, .unload = sis_driver_unload, .open = sis_driver_open, diff --git a/drivers/gpu/drm/tdfx/tdfx_drv.c b/drivers/gpu/drm/tdfx/tdfx_drv.c index 951ec13..3492ca5 100644 --- a/drivers/gpu/drm/tdfx/tdfx_drv.c +++ b/drivers/gpu/drm/tdfx/tdfx_drv.c @@ -55,7 +55,6 @@ static const struct file_operations tdfx_driver_fops = { }; static struct drm_driver driver = { - .driver_features = DRIVER_USE_MTRR, .fops = &tdfx_driver_fops, .name = DRIVER_NAME, .desc = DRIVER_DESC, diff --git a/drivers/gpu/drm/via/via_drv.c b/drivers/gpu/drm/via/via_drv.c index 4487999..92684a9 100644 --- a/drivers/gpu/drm/via/via_drv.c +++ b/drivers/gpu/drm/via/via_drv.c @@ -72,7 +72,7 @@ static const struct file_operations via_driver_fops = { static struct drm_driver driver = { .driver_features = - DRIVER_USE_AGP | DRIVER_USE_MTRR | DRIVER_HAVE_IRQ | + DRIVER_USE_AGP | DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED, .load = via_driver_load, .unload = via_driver_unload, diff --git a/include/drm/drmP.h b/include/drm/drmP.h index 914055e..5b9462d 100644 --- a/include/drm/drmP.h +++ b/include/drm/drmP.h @@ -76,7 +76,6 @@ #include #define __OS_HAS_AGP (defined(CONFIG_AGP) || (defined(CONFIG_AGP_MODULE) && defined(MODULE))) -#define __OS_HAS_MTRR (defined(CONFIG_MTRR)) struct module; @@ -141,7 +140,6 @@ int drm_err(const char *func, const char *format, ...); /* driver capabilities and requirements mask */ #define DRIVER_USE_AGP 0x1 #define DRIVER_REQUIRE_AGP 0x2 -#define DRIVER_USE_MTRR 0x4 #define DRIVER_PCI_DMA 0x8 #define DRIVER_SG 0x10 #define DRIVER_HAVE_DMA 0x20 @@ -1219,15 +1217,6 @@ static inline int drm_core_has_AGP(struct drm_device *dev) #define drm_core_has_AGP(dev) (0) #endif -#if __OS_HAS_MTRR -static inline int drm_core_has_MTRR(struct drm_device *dev) -{ - return drm_core_check_feature(dev, DRIVER_USE_MTRR); -} -#else -#define drm_core_has_MTRR(dev) (0) -#endif - static inline void drm_device_set_unplugged(struct drm_device *dev) { smp_wmb();